An attempt to set trial dates in a St. John’s manslaughter case were thwarted again in provincial court this week. This time because the accused has been waiting for an appointment at the new Mental Health and Addictions Centre. Twenty-nine-year-old Tanner Oliver was charged two years ago in the death of a 55-year-old woman on Hunt’s Lane. Police were called to a home on the street where they found with victim in serious condition, and she was r…